Supporting device for concrete-separating strips



Nov, 1 1927.

A. C. FHSCHER SUPPORTING DEVICE FOR CONCRETE .SEPARATING STRIPS Filed April 2. 1926 Y Zia 6%: (Ziberi 62 2 5/20;

will cover ,the top of the joint.

Patented Nov. 1, 1927.

' ALBERT C. FISCHER, OF CHICAGO, ILLINOIS. I

SUPPORTING DEVICE FOR CONCRETE-SEPARATING STRIPS.

Application filed April 2, 1926. Serial No. 99,289.

My invention relates'in general to the construction of roadways and the like concrete structures, and has particular reference to a so-called contraction joint as used primarily as a separating strip for the concrete sections of a roadway.

The primary object of my invention is to provide a combination "device which will support the separating strip to facilitate installation ofv the same, and also reinforcethe strip in the roadway after the joint has been formed with the concrete poured around the same. I

An illustrativeembodiment of the invention is shown in the accompanying drawing, in which Figure 1 is a perspective view of a section of a separating strip; Figure 2 is a perspective view of the supporting device; Figure 3 is a perspective view of a separating strip installed prior to the pouring of the concrete sections and illustrating the application of the invention; Figure t is an end view of the supporting device and Figure 5 is a perspective view of a separat-- ing, strip having an expansion crown carried thereby.

Referring now to the drawing in detail, 1 represents the separating strip, which in most instances I prefer to produce from sheet metal, constructing the same with a tongue -2- on one side and groove on its opposite side. This tongue and groove structure will provide a projection on one side of the strip which will be imbedded in one of the concrete sections with the concrete in the opposite section filling in the groove -3- on the opposite side of the strip. The purpose of this construction is to lock the two sections together and prevent the sameifron i riding up or buckling due to expansion.

In some cases the top layer of the road However, when an expansion crown 4.-' (Figure 5) is used it will be exposed, but the same will I not be forced up due to the fact that the separating strip is anchored by the tongue and groove. This same feature also applies in cases where a space is'left on the top of the separating strip and a poured crown is used. v

The crown -4' shown in Figure 5, is of preformed structure and the material from which it is made will be fibrated asphalt orany other suitable compressible material. In the case of a poured crown the material may be, asphalt or any other material suit-- able for the purpose.

As shown in Figure 3, to install the strip it must be supported on the subsoil or. foundation 5- of the roadway, andp'roperly held in position until the concrete sections are poured. To support the strip I equip the same with a supporting device, which may be stamped orotherwise formed from sheet metal, and comprising an angular attaching plate 6, which is made to conform to the angle of the tongue and groove of the strip, having holes or openings punched therein, corresponding to like holes or openings in the'separa-ting strip, so that rivets or other suitable attaching means may be employed to attach the plate.

The web portion 7 which overlies the flat side of the strip below the tongue and groove is cut so as to provide a stake 8-,

which is sunk in the subsoil orfoundation -5 of the roadway, and with the material on opposite sides of this stake 8 turned up at right angles to the stake 8 to provide horizontal arms 9 and 10 to project from opposite sides of the device, and likewise from opposite sides of the strip. When the supporting device is attached thereto the arms 9 and 10 lie upon the surface of the subsoil or foundation 5 of the roadway, as best shown in Figure 3.

lVith this construction the stake 8 and the arms 9 and 10 properly support the separating strip prior to the pouring of the concrete sections and the arms 9 and 10 further act to prevent the strip from sinking into the subsoil or foundation 5 of the roadway, since they lie upon the subsoil or foundation 5 as explained.

Ordinarily the separating strips 1 will holes or openings 11 and 12 in the tongue and groove of'the strip at both ends of the same, two or more sections of strip may be placed end to end, and by using the plate 6 to overlap the almtting sections rivets or.other securing means may engage the openings or holes 11 and 12 and lock the sections together by the plate.

In Figure 4 is shown a slightlv modified construction of a supporting device in that instead of terminating the plate -6 at the bend 13, I will form the same with an extension -14 which will overlie the flat side of the strip abovethe tongue and groove.

method of supporting these separating strips so that they may be evenly imbedded in the concrete and prevented from sinking into the subsoil or foundation of the roadway.

I claim:

1. A support for strips of the class described, comprising an oblong plate cut at one end to provide integral and separately acting parts, the intermediate one of the parts projecting downwardly as a staking means, the two outside parts being bent in opposite directions and at right angles to the staking means to provide transverse supports, the uncut part of the plate adapted to lie flush against a separating strip and means for attaching the same thereto.

2. A support for strips of the class described, comprising an oblong plate cut at one end to provide integraland separately acting parts, the intermediate one of the parts projecting downwardly as a staking means, the two outside parts being bent in opposite directions and at right angles to the staking means to provide transverse sup: ports, the uncut part of the plate being shaped to conform to the side of a tongue and groove strip and means for attaching the plate to the strip.

Signed at Chicago, Illinois, this 30th day of March 1926.

ALBERT o. FISCHER. 

